Intumescent putty or mastic

Details Intumescent putty or mastic Intumescent putty or mastic

C - Chemistry, Metallurgy

08

L

403/9

C08L 61/28 (2006.01) C08L 29/14 (2006.01) C08L 31/04 (2006.01)

Patent

CA 1238750

- 12 - ABSTRACT PUTTY OR MASTIC A composition suitable for use as a putty or mastic comprises, as a solid phase, fine particles of solid intumescent material or which when subjected to elevated temperature, as under fire conditions, form intumescent material, the fine particles being mixed in a solution of a flexible stretchable film-forming adhesive polymer in a volatile solvent. The solid phase may comprise a carbonific, a spumific, an activator and a binder. The carbonific may be a polyhydroxy compound. The spumific may be dicyandiamide or guanidine. The activator may be an ammonium phosphate. The binder may comprise melamine formaldehyde resin. The solid phase may comprise vinyl acetate polymer as additional binder.

440049

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